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E. S. KEENE.

LETTERING PEN.

APPLICATION man JUNEZB. I919.

Patented Nov. 4, 1919.

EDWARD S. KEENE, OF AGRICULTURAL COLLEGE, NORTH DAKOTA.

LETTERING-PEN.

Specification of Letters Patent.

Patented Nov. 4, 1919.

Application filed June as, 1919. Serial No. 307,350.

To all whom it may concern:

Be it known that I, EDWARD S. KEENE, a citizen of the United States, residing at Agricultural College, in the county of Cass and State of North Dakota, have invented certain new and useful Improvements in Lettering-Pens, of which the following is a specification.

The present invention is an improvement on the lettering pens of my Patents Nos. 1,158,230, October 26, 1915, and 1,271,580, July 9, 1918.

At the present day there is no fountain pen, so far as I am aware, which is adapted to use any kind of heavy ink and to meet the requirements of successful lettering,

work, and it is the object of my invention, generally speaking, to provide an improved pen which may be used for any lettering operation with any kind of heavy ink without likelihood of any interruption of the requisite feed or flow of the ink to the nib or point.

In my aforementioned patents the flow of the ink to the point is controlled by a valve of conical form; in the present pen I have improved this valve in certain particulars whereby it constitutes an automatic feed controller, doing away with the necessity of using any form of regulating means for adjusting or opening and closing the valve, such as provided in my patents. These improvements reside in the form or shape of the feeding device, the arrangement and nature of certain channels therein, and the relationship of the feeding device to the point of the pen, all arranged and adapted so that the flow of the ink from the barrel, past the feed device, is caused by a combined gravital and capillary action which, however, does not permit the ink to escape when the pen is not in use.

My improvements reside, further, in a reservoir or barrel combined with a selfcontained or unitary feeding section attachable to, and detachable from, the barrel and itself embodying a point, an ink feeder, and means for supporting the latter in an improved manner..

The invention is susceptible of modification and, therefore, the disclosure in the drawings and the following description is to be considered as illustrative, rather than restrictive of the scope of the invention.

In the accompanying drawings,

Figure 1 is a longitudinal section of the complete pen, greatly enlarged;

Figs. 2 and 3, plan and side views of the point and its attaching nipple;

Fig. 4 a detail plan view of the feeding unit;

Fig. 5 a detail view, partly broken away, of the coupling sleeve;

Figs. 6 and 7 end and side detail views, respectively, of the feed device;

Figs. 8 and 9 similar views respectively, taken at right angles to the views of Figs. 6 and 7 and Fig. 10 a View of the left hand end of the unit of Fig. 4.

The pen comprises, in the main, two parts, the reservoir or barrel 1 and the self-contained, unitary, feed section 2. The barrel has a screw-threaded portion 3 for the attachment of the ordinary cap 4 which may be screwed onto the threaded part 5, to inclose the point, when the pen is not in use.

The self-contained unitary section 2 has a tubular part 6 provided with screw threads 7 engaged with corresponding threads in the interior of the mouth of the barrel or reservoir section 1. The part6 also has a frusto conical part 8, a shoulder 9, and an internal screw threaded coupling sleeve 10, Fig. 5, which has a shoulder 11 bearing against the shoulder 9 and is rotatable on the blank portion of the member 6 and provided with internal screw threads 12.

The nipple 13 has a concaved mouth 14 which bears against the frust-o conical portion 8 and with which it is held in tight contact by the engagement of its screw threads 15 with the screw threads 12.

The sections 17 and 18, respectively, the former being straight and inclined and the latter formed of two parts arranged at an angle to each other. A chamber 19 is provided by the part 17 and that portion of the part 18 which converges toward the part 17. The sections 17 and 18 are suitably secured at 20 to the nipple 13. 7

My improved feed device 21 is of the form shown in Figs. 4, 6, 7 8 and 9. It is provided with a hole 22 which receives the end of a pin 23 whose other end is suitably secured at 24 to the cross piece 25 of the part 6, whose rear end is open at 26 to admit inpoint 16 comprises upper and lower,

feed device there are longitudinally extend ing channels 30 which run from one end of the feed device to the other end thereof. These channels may be of the same width throughout their length but, preferably, they have a constricted p'ortion31 located about intermediate their ends, the purpose of which is to slightly choke the fiow'of ink and minimize the chance of accidental flow when the pen is not in use The channels. 30 in the conical portion 28 forma cleft 32 where they converge and cross. The part 32 forms a chamber which holds the reserve I supply in regulating the flow of ink from the barrel to the pen point. a The discharge of ink from the barrel is due to the intermittent entrances of air. The chamber 32 contains a volume sufficient to supply the points with ink between discharges and thus creates a uniform flow of ink and a consequent uniform mark is made by. the points in lettering. The feed device may touch, orclosely fit the wallsof the sections 17 and 18.

but, preferably, .it' is slightly separated or spaced from said walls so that there is the opportunity of clearing the cleft of thickened ink or any obstruction to the flow of the ink, which is accomplished by drawing through the clefta piece of stiff paper which completely removes all oppositionto a ready flow of ink. y

. The. flow of the ink occurs automatically when the point is pressed against a surface, such. flow resulting from combined gravitational and capillary action. However, when the point is not in contact with a surface to be written upon, the flow is automatically checked. I The tips 33 and 3% of the sections l7 and 18 are not in contact but are separated a suflicient distance to permit a heavy piece of paper to be inserted between them for removing any obstruction.

.dy invention provides an automatically feeding fountain lettering pen for usewith any'kind of heavy ink.

section 6 M7, the entire feeding section OI By unscrewing the the pen can be disconnected, as a unit, from the fountain or reservoir section 1. Access 7 can be readily had to the parts by unscrewing the sleeve 10 and nipple 13 so that cleansing may be obtained quickly and eas ly.

What I claim is: 1. In a lettering pen, the combination with a hollow point, of a tapered feeding'device projecting into said hollow point and provided with a cleft in its tapered part and having one or more longitudinal ink feedwith a plurality of longitudinally extending ink feeding channels each having a constricted portion. a

3. In a lettering pen, the combination with a hollow point, of a feeding device projecting into saidhollow point and provided with a longitudinally extending ink feeding channel which has a constricted portion, intermediate its ends. v

4. In a lettering pen, the combination with a hollow point, of a: feeding device projecting into said hollow point and provided with a plurality of longitudinal ink feeding channels which intersect eachl other and forma cleft. V f 4 5. In a lettering pen, the combination with a point having a chamber provided with converging walls,.of an ink feeding device provided with a tapered portion projecting into the chamber of; the point and provided with longitudinally. extending ink feeding I Y channels which intersect in the taperedportion of the feeder, there forming a cleft.

6. In a lettering pen, the combination with a point having achamber provided. with converging walls, of an ink feeding device provided with a tapered portion projecting 7 into the chamber of the point andprovided with longitudinally extending ink feeding channels which intersect in the taperedpOrtion of the feeder, there forming a cleft, and

an air admission channel intersecting one of the inkfeeding channels, said feeding device having a fixed relationship to the con verging walls of said chamber. 7 v

' 7. In a fountain lettering pen, the "combination with a barrel or reservoir, of a tubular section detachably connected to the, barrel or' reservoir, a nipple, a sleeve detachably securing the nipple to. the tubular section, a hollow point secured to the nipple, a feeder projecting into the hollow point, and a pin for holding the feeder in position,

said pin being. carried by the unitary structure comprising sleeve and point.

In testimony whereof I aflix my signature;

EDWARD S. KEENE'.

he tubular section, nipple,

' Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents,

' Washington, ID. 0.? V 

